Re: Re(2): [Exim] Exim delivery problem

Hello.

The command `ifconfig eth0 mtu 1000` helped me.

The problem is solved.
Thank you.

On Fri, Dec 08, 2000 at 02:50:53PM +0100, Armin Hornetz wrote:
> ph10@??? writes:
> >On Thu, 7 Dec 2000, Alexander G. Jerjomin wrote:
> >
> >> I can't send mail only to few hosts. Logfile shows me
> >>
> >> T=remote_smtp defer (110): Connection timed out:
> >> SMTP timeout while connected to mail.xxxxxxx.ee [x.y.z.v]
> >> after end of data (7188 bytes written)
> >>
> >> But I can send mail if size of mail less than ~1024 bytes.
> >>
> >> I have installed 'Smail-3.2.0.109' on another PC and I can send
> >> my problem mail from this host to mail.xxxxxxx.ee.
> >
> >Are the two hosts on the same LAN? If not, this sounds like some kind of
> >networking issue. There's something in the FAQ about problems with large
> >messages which cause this problem over some network connections.
> >
> >If the two hosts are on the same LAN, this seems very odd.
> >
> The problem might be the MTU size assigned to the interfaces (and the
> router!!) And yes, it is also possible to experience that problem on the
> same LAN. The default MTU is 1500 on most implementations. some router
> might drop packages with too much payload. So your exim might send all the
> packages, but they never reach the target. Use tcpdumpt to check traffic
> between your exim machine and your smail machine. use IFCONFIG to check
> and adjust the MTU size of your interfaces. Try to set MTU size on your
> exim PC to 1000 (ifconfig eth0 1000, if eth0 is your network interface),
> just to check whether it's working or not. BEWARE: somtimes the MTU
> adjustment crashes a machine, so be sure to end all important applications
> before ;)
>
> Armin
>